A few weeks back I shared some art practice playing with making custom brushes in Clip Studio Paint.

One of those compositions had a silhouette that looked like a giant robot to me. I've started sketching over that background to see what that robot turns into.

More likely it's a piloted mech. Not sure what it's job would be for sure, the landscape looks like a metallic landscape of either growth or decay. If it's growth it's a metal based biology, which sounds like a fun path to explore.